Window-screen



Y No. 288,921. Patented Nov. 2o, 1883.

(No Model.) n

V. R. G-HAMBERLIN.

WINDOW SCREEN.

A Fig-14 UNITED STATES PATENT OFFICE.

VOLNEY It. CHAMBERLIN, OF CAMBRIDGE, MASSACHUSETTS.

WINDOW-SCREEN.

SPECIFICATION forming part of Letters Patent No. 288,921, dated November 20, 1883.

Application filed September 17, 1883. (No model.)

To @ZZ whom t may concern:

Be it known that I, VoLNEY R. CHAMBER- LIN, of Cambridge, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Adjustable W'indcw- Screens, which will, in connection with the accompanying drawings, be hereinafter fully described, and specifically defined in the appended claims.

This invention relates to that class of adj ustable window-screens which are described and shown in the application for Letters Patent of the United Statesiled by me on the 7th day of April, 1883, and numbered 90,938, of the series of 1880; and the invention consists in the construction and combination of the divers devices embodied therein, as will, in connection with the accompanying drawings, be hereinafter more particularly described and claimed.

In said drawings, Figure 1 is a plan view, showing two corners oi' a screen with my improvement thereto applied. Fig. 2 is a horizontal sectiontalren online X X, Fig. l. Fig. 3 is a perspective view ofthe corner of a screen with my combined tlyguard and lip-supporter thereto applied.

In said views, a represents a section of the lower rail. b is a section of the upper rail, and cthe side rail, the middle portion being broken away in order to enlarge the parts shown, the parts b c being shown in section parallel with the plane of the screen, and as taken on line YV XV, Fig. 2. An expandingbar, d, havinga lip, e, is secured to the frame of the screen by guide-rods f f, "which are screw-threaded in part of their length, and are screwed into bar d, as shown. l Said rods are inserted in holes gin the frame, and a helical spring, Ii, is mounted upon each rod, and is housed in a chamber, which is an enlargement of hole g. The shoulder at the inner end of said chamber serves as the abutment, against which the inner end 0f said spring bears.

In order that the springs shall exert a uniform pressure upon bars d, whether the saine are at a greaterl or less distance from rail c, I

mount the Correspondingly-threaded nuts i on rods f, to serve as an abutment against which the outer end of springs ii act, and by turning said nuts along the rods the requisite distance the required expansive force of the coiled spring may be utilized to hold bar d against the window-j amb with the necessary pressure, and this regardless of the distance between said bar and rail c, as when bar d is near rail c then the nut is adj usted near to the bar, and when the bar, in order that the screen may fill the window, is farther from the rail, then the nut is adjusted farther from the bar. When bar d is expanded, as shown, or to any material extent, the space between it and rail c affords an ingress for insects, which can enter at the top and find their way indoors, despite lip e, and hence it has been the practice to secure to the bar d a thin plate of metal, as shown at j, Fig. 3, there being a narrow slit therein for the insertion of a small nail, k, driven into the main frame, thus allowing the metal plate or guard to slide with bar d when the same was moved relatively to the side bar. My improvement in this behalf consists in forming said metal guard with a lip, l, bent at right angles to the main part, and so as to inclose the end of lip e of bar d, and secure the same from injury or splitting from the bar.

I claim as my invention- 1. In an adjustable screen, the combination, with the guide-rods f and helical springs h, mounted thereon, of screw-nuts i, threaded on said rods, and adjustable thereon relatively to the adjusting-bar, whereby a uniform force or pressure upon said springs may be maintained, substantially as speciiied.

2. In an adjustable window-screen, the metallic guard j, formed with the angle-lip Z, to overlie lip e of bar d, whereby said lip e is supported and protected from' injury, substantially as specified.

VOLNEY It. CHAIWIBERLIN.

Witnesses:

T. "W, PORTER, J. A. MAXWELL. 

